期刊
ENVIRONMENTAL SCIENCE & TECHNOLOGY
卷 34, 期 16, 页码 3474-3479出版社
AMER CHEMICAL SOC
DOI: 10.1021/es990901b
关键词
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An indirect electrochemical method, which is very efficient for the degradation of organic pollutants in water, is described. The method, named electro-fenton, is based on electrocatalytical generation of Fenton's reagent to produce hydroxyl radicals, which are very active toward organic compounds. An industrial pollutant p-nitrophenol (PNP), was chosen for this study and was eventually mineralized. The major intermediary degradation products such as hydroquinone, benzoquinone, 4-nitro-catechol, 1,2,4-trihydroxybenzene and 3,4,5-trihydroxy-nitrobenzene were unequivocally identified by HPLC and GC-MS methods. The rate constants of the hydroxylation reactions were determined. The mineralization of the initial pollutant and the intermediates formed during electro-Fenton treatment was followed by total organic carbon (TOC) analyses. Dependence of mineralization on the amount of electrical energy consumed is shown by the relative decrease of TOC values. A mineralization reaction mechanism is proposed.
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